//日历辅助类
public class CalendarHelper
{
/// <summary>
/// 结构。日期对象
/// </summary>
private struct structDate
{
public int year;
public int month;
public int day;
public bool isLeap; //是否闰月
public int yearCyl; //年干支
public int monthCyl; //月干支
public int dayCyl; //日干支
}
/// <summary>
/// 结构。完整的日期对象
/// </summary>
public struct StructDateFullInfo
{
/// <summary>
/// 公历年
/// </summary>
public int Year;
/// <summary>
/// 公历月
/// </summary>
public int Month;
/// <summary>
/// 公历日
/// </summary>
public int Day;
/// <summary>
/// 是否闰月
/// </summary>
public bool IsLeap; //是否闰月
/// <summary>
/// 农历年
/// </summary>
public int Cyear; //农历年
/// <summary>
/// 农历年名称
/// </summary>
public string Scyear; //农历年名称
/// <summary>
/// 干支
/// </summary>
public string CyearCyl; //干支年
/// <summary>
/// 农历月
/// </summary>
public int Cmonth; //农历月
/// <summary>
/// 农历月名称
/// </summary>
public string Scmonth; //农历月名称
/// <summary>
/// 干支月
/// </summary>
public string CmonthCyl; //干支月
/// <summary>
/// 农历日
/// </summary>
public int Cday; //农历日
/// <summary>
/// 农历日名称
/// </summary>
public string Scday; //农历日名称
/// <summary>
/// 干支日
/// </summary>
public string CdayCyl; //干支日
/// <summary>
/// 节气
/// </summary>
public string solarterm; //节气
/// <summary>
/// 星期几
/// </summary>
public string DayInWeek; //星期几
/// <summary>
/// 完整的日期信息
/// </summary>
public string Fullinfo; //完整的日期信息
}
#region 农历相关数据
//农历月份信息
private readonly int[] lunarInfo = new int[]{0x04bd8,0x04ae0,0x0a570,0x054d5,0x0d260,0x0d950,0x16554,0x056a0,0x09ad0,0x055d2,
0x04ae0,0x0a5b6,0x0a4d0,0x0d250,0x1d255,0x0b540,0x0d6a0,0x0ada2,0x095b0,0x14977,
0x04970,0x0a4b0,0x0b4b5,0x06a50,0x06d40,0x1ab54,0x02b60,0x09570,0x052f2,0x04970,
0x06566,0x0d4a0,0x0ea50,0x06e95,0x05ad0,0x02b60,0x186e3,0x092e0,0x1c8d7,0x0c950,
0x0d4a0,0x1d8a6,0x0b550,0x056a0,0x1a5b4,0x025d0,0x092d0,0x0d2b2,0x0a950,0x0b557,
0x06ca0,0x0b550,0x15355,0x04da0,0x0a5d0,0x14573,0x052d0,0x0a9a8,0x0e950,0x06aa0,
0x0aea6,0x0ab50,0x04b60,0x0aae4,0x0a570,0x05260,0x0f263,0x0d950,0x05b57,0x056a0,
0x096d0,0x04dd5,0x04ad0,0x0a4d0,0x0d4d4,0x0d250,0x0d558,0x0b540,0x0b5a0,0x195a6,
0x095b0,0x049b0,0x0a974,0x0a4b0,0x0b27a,0x06a50,0x06d40,0x0af46,0x0ab60,0x09570,
0x04af5,0x04970,0x064b0,0x074a3,0x0ea50,0x06b58,0x055c0,0x0ab60,0x096d5,0x092e0,
0x0c960,0x0d954,0x0d4a0,0x0da50,0x07552,0x056a0,0x0abb7,0x025d0,0x092d0,0x0cab5,
0x0a950,0x0b4a0,0x0baa4,0x0ad50,0x055d9,0x04ba0,0x0a5b0,0x15176,0x052b0,0x0a930,
0x07954,0x06aa0,0x0ad50,0x05b52,0x04b60,0x0a6e6,0x0a4e0,0x0d260,0x0ea65,0x0d530,
0x05aa0,0x076a3,0x096d0,0x04bd7,0x04ad0,0x0a4d0,0x1d0b6,0x0d250,0x0d520,0x0dd45,
0x0b5a0,0x056d0,0x055b2,0x049b0,0x0a577,0x0a4b0,0x0aa50,0x1b255,0x06d20,0x0ada0};
//公历月份
private readonly int[] solarMonth = new int[] { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
private readonly string[] cMonthName = new string[] { "", "正月", "二月", "三月", "四月", "五月", "六月", "七月", "八月", "九月", "十月", "十一月", "十二月" };
//天干
private readonly string[] gan = new string[] { "甲", "乙", "丙", "丁", "戊", "己", "庚", "辛", "壬", "癸" };
//地支
private readonly string[] zhi = new string[] { "子", "丑", "寅", "卯", "辰", "巳", "午", "未", "申", "酉", "戌", "亥" };
//生肖
private readonly string[] animals = new string[] { "鼠", "牛", "虎", "兔", "龙", "蛇", "马", "羊", "猴", "鸡", "狗", "猪" };
//节气
private readonly string[] solarTerm = new string[] {"小寒","大寒","立春","雨水","惊蛰","春分","清明","谷雨","立夏","小满"
,"芒种","夏至","小暑","大暑","立秋","处暑","白露","秋分","寒露","霜降"
,"立冬","小雪","大雪","冬至"};
//节气对应数值？
private readonly int[] solarTermInfo = new int[] {0,21208,42467,63836,85337,107014,128867,150921,173149,195551,218072
,240693,263343,285989,308563,331033,353350,375494,397447,419210,440795
,462224,483532,504758};
//农历日子
private readonly string[] nStr1 = new string[] { "日", "一", "二", "三", "四", "五", "六", "七", "八", "九", "十" };
private readonly string[] nStr2 = new string[] { "初", "十", "廿", "卅", " " };
//公历月份名称
private readonly string[] monthName = new string[] { "JAN", "FEB", "MAR", "APR", "MAY", "JUN", "JUL", "AUG", "SEP", "OCT", "NOV", "DEC" };
#endregion
// 默认构造函数
public CalendarHelper()
{ }
//传回农历 y 年的总天数
private int GetLYearDays(int y)
{
int sum = 348;
for (int i = 0x8000; i > 0x8; i >>= 1)
{
sum += ((lunarInfo[y - 1900] & i) > 0) ? 1 : 0;
}
return sum + GetLeapDays(y);
}
//传回农历 y 年 m 月的总天数
private int GetLMonthDays(int y, int m)
{
return (((lunarInfo[y - 1900] & (0x10000 >> m)) > 0) ? 30 : 29);
}
//传回农历 y 年闰哪个月 1-12 , 没闰传回 0
private int GetLeapMonth(int y)
{
return (lunarInfo[y - 1900] & 0xf);
}
//传回农历 y 年闰月的天数
private int GetLeapDays(int y)
{
if (GetLeapMonth(y) > 0)
{
return (((lunarInfo[y - 1900] & 0x10000) > 0) ? 30 : 29);
}
else
{
return 0;
}
}
//得到农历日期
private structDate GetLunar(DateTime date)
{
structDate sd;
int i = 0;
int leap = 0, temp = 0;
DateTime baseDate = new DateTime(1900, 1, 31); //基准时间
int offset = (date - baseDate).Days; //与基准时间相隔天数
sd.dayCyl = offset + 40;
sd.monthCyl = 14;
for (i = 1900; i < 2050 && offset > 0; i++)
{
temp = GetLYearDays(i);
offset -= temp;
sd.monthCyl += 12;
}
if (offset < 0)
{
offset += temp;
i--;
sd.monthCyl -= 12;
}
sd.year = i;
sd.yearCyl = i - 1864;
//闰哪个月
leap = GetLeapMonth(i);
sd.isLeap = false;
for (i = 1; i < 13 && offset > 0; i++)
{
//闰月
if (leap > 0 && i == (leap + 1) && sd.isLeap == false)
{
--i;
sd.isLeap = true;
temp = GetLeapDays(sd.year);
}
else
{
temp = GetLMonthDays(sd.year, i);
}
//解除闰月
if (sd.isLeap == true && i == (leap + 1))
{
sd.isLeap = false;
}
offset -= temp;
if (sd.isLeap == false)
{
sd.monthCyl++;
}
}
if (offset == 0 && leap > 0 && i == leap + 1)
{
if (sd.isLeap)
{
sd.isLeap = false;
}
else
{
sd.isLeap = true;
--i;
--sd.monthCyl;
}
}
if (offset < 0)
{
offset += temp;
--i;
--sd.monthCyl;
}
sd.month = i;
sd.day = offset + 1;
return sd;
}
//传回公历 y 年 m 月的天数
private int SolarDays(int y, int m)
{
if (m == 2)
{
return (((y % 4 == 0) && (y % 100 != 0) || (y % 400 == 0)) ? 29 : 28);
}
else
{
return (solarMonth[m]);
}
}
//传入 offset 传回天干地支, 0=甲子
private string Cyclical(int num)
{
return (gan[num % 10] + zhi[num % 12]);
}
//某年的第n个节气为几日(从0,即小寒起算);参数n:节气下标
private int GetSolarTermDay(int y, int n)
{
double minutes = 0;
//1900年1月6日：小寒
DateTime baseDate = new DateTime(1900, 1, 6, 2, 5, 0);
minutes = 525948.766245 * (y - 1900) + solarTermInfo[n - 1];
DateTime veryDate = baseDate.AddMinutes(minutes);
return veryDate.Day;
}
//农历日子
private string GetCDay(int d)
{
string s = "";
switch (d)
{
case 10:
s = "初十";
break;
case 20:
s = "二十";
break;
case 30:
s = "三十";
break;
default:
s = nStr2[(int)System.Math.Floor((double)d / 10)];
s += nStr1[d % 10];
break;
}
return (s);
}
//获取日期信息，参数d:待检查的日子
public StructDateFullInfo GetDateTidyInfo(DateTime d)
{
StructDateFullInfo dayinfo;
structDate day = GetLunar(d);
dayinfo.IsLeap = day.isLeap;
dayinfo.Year = d.Year;
dayinfo.Cyear = day.year;
dayinfo.Scyear = animals[(day.year - 4) % 12];
dayinfo.CyearCyl = Cyclical(day.yearCyl);//干支年
dayinfo.Month = d.Month;
dayinfo.Cmonth = day.month;
dayinfo.Scmonth = cMonthName[day.month];
dayinfo.CmonthCyl = Cyclical(day.monthCyl);//干支月
dayinfo.Day = d.Day;
dayinfo.Cday = day.day;
dayinfo.Scday = GetCDay(day.day);//日子
dayinfo.CdayCyl = Cyclical(day.dayCyl);//干支日
switch (d.DayOfWeek)
{
case DayOfWeek.Sunday:
dayinfo.DayInWeek = "星期日";
break;
case DayOfWeek.Monday:
dayinfo.DayInWeek = "星期一";
break;
case DayOfWeek.Tuesday:
dayinfo.DayInWeek = "星期二";
break;
case DayOfWeek.Wednesday:
dayinfo.DayInWeek = "星期三";
break;
case DayOfWeek.Thursday:
dayinfo.DayInWeek = "星期四";
break;
case DayOfWeek.Friday:
dayinfo.DayInWeek = "星期五";
break;
case DayOfWeek.Saturday:
dayinfo.DayInWeek = "星期六";
break;
default:
dayinfo.DayInWeek = "星期？";
break;
}
//节气
//每个月有两个节气
int d1 = GetSolarTermDay(d.Year, d.Month * 2 - 1);
int d2 = GetSolarTermDay(d.Year, d.Month * 2);
if (dayinfo.Day == d1)
{
dayinfo.solarterm = solarTerm[d.Month * 2 - 2];
}
else if (dayinfo.Day == d2)
{
dayinfo.solarterm = solarTerm[d.Month * 2 - 1];
}
else
{
dayinfo.solarterm = "";
}
dayinfo.Fullinfo = dayinfo.Year.ToString() + "年" + dayinfo.Month.ToString() + "月" + dayinfo.Day.ToString() + "日";
dayinfo.Fullinfo += " " + dayinfo.DayInWeek;
dayinfo.Fullinfo += " 农历" + dayinfo.CyearCyl + "（" + dayinfo.Scyear + "）年";
if (dayinfo.IsLeap)
{
dayinfo.Fullinfo += "闰";
}
dayinfo.Fullinfo += dayinfo.Scmonth + dayinfo.Scday;
if (dayinfo.solarterm != "")
{
dayinfo.Fullinfo += " " + dayinfo.solarterm;
}
return dayinfo;
}
}
作者：shanzm
